A boisterous and tomboyish girl. Her righteous and upright personality extends even to ghosts, as she listens to their past stories. She can see ghosts and uses the Ghost Ball to summon them.

A young exorcist from the East. He is calm, cool-headed, and possesses high levels of insight, decisiveness, and resourcefulness. As an exorcist, he has strong spiritual power, and his physical abilities far exceed those of ordinary humans. He fights using various talismans and the Geumryung Exorcism Sword.

An agent of Aegis, a secret exorcist organization in Europe. While he has a cheerful and kind personality, he isn't just a simple optimist. He can fight using the Sephir Cards used by Aegis members and can sense spiritual energy. Furthermore, he was born with the power of darkness, allowing him to handle Cliff Cards.

He usually acts arrogant and teases others, appearing like a neighborhood brat with high self-esteem, but he is actually kind and affectionate. He knows when to be serious, but normally, he is quite charming and playful.

It is said that when Leon faces a crisis and his mental strength weakens, or when the energy of the night grows strong, he transforms into Cain. Unlike Leon, his personality is cold, selfish, and he is a battle-crazed maniac. He uses Cliff Cards and can freely manipulate the power of darkness.